Table 4.
Correlations between the predictor candidates and postoperative VAS scores
| Type | Predictors | r | p-value |
|---|---|---|---|
| Spatiotemporal measurements | AutoCorr-P2-Mean | −0.70 | 0.0035 |
| CrossCorr-P2 | −0.69 | 0.0044 | |
| AutoCorr-P5-Min | −0.63 | 0.012 | |
| SumMag-P2-Min | 0.61 | 0.015 | |
| MeanTime-P1P2-Max | 0.60 | 0.017 | |
| Clinical variables | Age | 0.33 | 0.22 |
| Gender | 0.21 | 0.44 | |
| Duration of symptoms | 0.30 | 0.28 | |
| Walking ability | −0.10 | 0.72 | |
| Presence of scoliosis | 0.12 | 0.66 | |
| Smoking status | 0.45 | 0.089 | |
| Acute injury | −0.35 | 0.20 | |
| Previous spine surgery | 0.47 | 0.076 | |
| Number of affected disk | 0.0045 | 0.87 | |
| BMI | 0.45 | 0.093 | |
| Preoperative outcomes | Preoperative VAS | 0.38 | 0.16 |
| Preoperative ODI | 0.30 | 0.27 |
Top five spatiotemporal measurements with the largest absolute Spearman correlation coefficients (r) are listed. All clinical variables, including the functional outcomes that were collected preoperatively, are also listed